Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcecf0d16c6b39d…

MALICIOUS

PDF

83.3 KB Created: 2021-03-19 11:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f260f4cd904523b65ff3be5dd5e43126 SHA-1: b78bddf251991cec25812b596531573b79c4d906 SHA-256: 2fcecf0d16c6b39dfc6f82cba45d0c103017b8b19b3b710dc05d297bbb7dc001
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites disguised as legitimate document downloads. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/award?keyword=biology+book+class+11+bengali+pdf PDF link annotation
    • http://silkhfig.bid/why_is_my_whirlpool_oven_not_heating_uphpfhj.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/fjijbjh/18144178150.pdfIn PDF document text
    • http://vagijuderotogur.22web.org/endocrine_society_guidelines_thyroid_storm.pdfIn PDF document text
    • https://cdn.sqhk.co/gofejenizew/bQnRmfk/57360851704.pdfIn PDF document text
    • https://gitinegu.weebly.com/uploads/1/3/4/6/134648864/2351038.pdfIn PDF document text
    • http://mstmail.space/anatomie_et_physiologie_de_l_oreillebc4ya.pdfIn PDF document text
    • http://mx50off.pro/bevitibmy2dm.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/gijujhF/movoziwotigiwibuvojo.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/ejhggjS/30994395179.pdfIn PDF document text
    • http://opensol.xyz/712583503684bqgg.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/buvituxi-bamokesasejo.pdfIn PDF document text
    • http://study-english-04.space/how_to_interpret_iready_scoreswal53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/9819915527.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/business_mathematics_and_statistics_lecture_notes.pdfIn PDF document text
    • http://roduzafudi.rf.gd/std_12_science_biology_ncert_textbook_in_gujarati.pdfIn PDF document text
    • http://mebexadesojixip.rf.gd/water_pollution_images_for_project.pdfIn PDF document text
    • http://jetetejev.rf.gd/biruzasamufasilorov.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/pdf_to_word_editable.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/vorufosakekinozupapa.pdfIn PDF document text
    • http://lenadupubop.rf.gd/losezofuzati.pdfIn PDF document text
    • http://junenizexi.epizy.com/90559752845.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB20 5636 bytes
SHA-256: 352d01ea7a5c8819d427c66a3e1c28149ae1954832828ad036b914d9e4c2db7c
font_01_sfnt_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 6996 bytes
SHA-256: a798e5693c2da10ec35f607a0bfb6a31001d0c3a9437a032e724daca78588453
font_02_sfnt_off0001053a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053A 10584 bytes
SHA-256: 689e6b9949179c3f8f2c4c3426fc746463895d97a362b2f2a64dbb95da5fb794
font_03_sfnt_off0001299b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299B 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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